Officersbegan discovering the body parts - some in bags and some not - about 4p.m. Thursday in St. Clair and China townships about 50 miles northeastof Detroit after a caller reported suspicious activity, St. Clair CountySheriff Tim Donnellon said.

"That was not body parts but evidence related to this crime scene," Donnellon said.

The body parts were discovered in at least four locations after awoman called Thursday to report heavy-set, middle-aged white womandumping garbage out of her mid-1990s SUV, grayish-white or tan in color,possibly a GMC Jimmy or Chevrolet Trailblazer. The number of bags wasnot disclosed.

The human remains have not been linked to a specific person.

"Wecan say it is a white male, but that's pretty much all we're going onat this point." Donnellon said. "We are tracking down leads on missingpeople.

"That very well could be tied into these garbage bags," Donnellon said.

Detectives,members of the Michigan State Police Forensic Crime Lab and officialsfrom the St. Clair County Medical Examiner's Office are investigating. An autopsy is scheduled Friday afternoon, the St. Clair County Sheriff's Office said in a news release.